Policy inheritance for relation_scope

[danielnc]

I have a base account policy:

class Accounts::BasePolicy < ApplicationPolicy
  authorize :user, :account
  relation_scope do |relation|
    relation.where(account_id: account.account_id).order(:id)
  end

All my policies inherit from this parent policy so we can properly handle multi tenancy and avoid issues with records leaking across different accounts, but the problem comes when I have a specific policy that needs to add a new relation_scope

class Accounts::Products::SectionPolicy < Accounts::BasePolicy
  authorize :product

  relation_scope do |relation|
    relation.where(product_id: product.id).order(:id)
  end

authorize is inherited as expected(section policy will require user, account and product)

But its overwriting relation_scope, i would like to have a "default_scope" for inherited policies, how can I properly achieve that where there are no room for human errors when someone overwrites the relation_scope and forgets to add the account_id filter?

[palkan]

how can I properly achieve that where there are no room for human errors when someone overwrites the relation_scope and forgets to add the account_id filter?

You mean something like scopes chaining? That is, the relation passed to the child class block should be transformed by the default block?

Then you can use super:

class Accounts::Products::SectionPolicy < Accounts::BasePolicy
  authorize :product

  relation_scope do |relation|
    super(relation).where(product_id: product.id).order(:id)
  end
end

Added an example to the docs: d8c76db

[danielnc]

Exactly what I was looking for <3